1. Massimo Masera INFN sezione di Torino
ITS status report
Massimo Masera
INFN sezione di Torino
ALICE offline week – 07/07/08

2. Summary SPD tasks SPD status (D. Elia) SDD tasks SSD tasks
Update of calibration classes
ITS tasks
Shuttle status and FDR tasks

3. SPD tasks
Fast OR DA 20/10/08
Done. Peter is going to commit the code to STEER and ITS in one go
This should be removed (ITS task)

4. Calibration Online calibration and DAs: Calibration files:
code readiness in good shape, testing ongoing
DA for FastOR DAC tuning:
manual tuning ongoing, trying to figure out an algorithm
task still in the planning, dead-line
Calibration files:
lists of dead and noisy pixels to the OCDB
recent updates in AliITSCalibrationSPD:
driven by a global need to gain memory (TArrayI  TArrayS)
backward compatibility preserved (streamer function)
code usable with all past calibration files
in coll. with H. Tydesjo
D. Elia (INFN Bari)
Offline week / CERN

5. Calibration Calibration files (cont’d): files presently on svn:
$ALICE_ROOT/ITS/Calib/SPDDead
dead pixels from ladder tests as in CDB (6488)
full (disconnected) half-stave 6C-0 (81920)
total of dead pixels (0.9% SPD)
$ALICE_ROOT/ITS/Calib/SPDNoisy
empty list, no noisy pixels assumed (or hardware masked)
“First Physics” productions done/to be done with this calib
for the ongoing official reconstruction of runIII:
64 (unmasked) noisy pixels taken into account
in coll. with H. Tydesjo
D. Elia (INFN Bari)
Offline week / CERN

6. Reconstruction Clusterfinder:
added functionality to mask noisy pixels
masking successfully used in reconstruction
Access to OCDB (bad modules/pixels) info:
done independently in the tracker (A. Dainese)
some functionality provided in AliITSsegmentation classes
(how to retrieve chipID from a given track prediction, etc)
Official reconstruction:
list of SPD runs and priorities provided
process ongoing, no problems
in coll. with H. Tydesjo, G. Bruno
D. Elia (INFN Bari)
Offline week / CERN

7. Quality Assurance QA Makers: QA Checkers:
filling of the relevant QA histograms
implementation completed for all the requested QA levels:
Hits (simulation)
Digits (simulation)
Raw data and RecPoints (real and sim)
QA Checkers:
checks on QA histos and/or comparisons with reference data
basic implementation done (check on histogram entries)
still to be refined/completed, eg adding:
check on number and type of data format errors
in coll. with M. Nicassio
D. Elia (INFN Bari)
Offline week / CERN

8. Other issues Fast-OR chip info in the ESD: Code documentation:
requested for trigger correction studies
Fast-OR bits not in the data yet, internally discussed
present implementation to allow high multiplicity checks:
define as “fired chips” those with ≥ 1 cluster
store in the ESD the number of “fired chips” per layer
code is ready and sent for committing
Code documentation:
basic description of the detector offline scheme
prepared as html document for each ITS sub-detector
on svn since May: $ALICE_ROOT/ITS/doc/doc_spd.html
D. Elia (INFN Bari)
Offline week / CERN

9. This should be removed (ITS task)
SDD Tasks
Martin Poghosyan is working at this. Rotation matrices this week. In contact with Raffaele
This should be removed (ITS task)

10. This should be removed (ITS task)
SSD tasks
Why red?
The SSD calibration classes are being revised in order to reduce the memory consumption. See Enrico’s talk today
This should be removed (ITS task)

11. Calibration classes (I)
Calibration classes for ITS sub-detectors are presently being improved in order to:
Reduce size of calibration objects
Split parameters used only in simulation from the ones used in both simulation and reconstruction
Split parameters coming from online DAs from the ones coming from other calibration procedures (e.g. SDD time offset or ADC calibrations)
Expected deadline for the new code: mid July, for the next branch (v4-14-Release)
Major modifications needed for SSD calibration classes (see next slide)

12. Calibration classes (II)
New organization, presently under development and test:
AliITSSimuParam (new class, prototype committed to the trunk)
Store calibration parameters used only in simulation
1 class and 1 object for the 3 sub-detectors (SPD, SDD, SSD)
For the moment not stored in OCDB
AliITSCalibrationSXD (old classes, being redesigned for SSD)
Store calibration parameters used both in simulation and reconstruction
Values in OCDB coming from DAs via AliITSPreprocessorSXD
For SPD and SDD 1 instance for each module
For SSD one single AliITSCalibrationSSD object with data of all SSD modules
Contain objects of “helper” classes (e.g. AliITSDriftSpeedSDD, AliITSNoiseSSD)
AliITSresponse (existing class, almost completely renewed)
Store calibration parameters used only in reconstruction
Values in OCDB not from online DAs
1 single instance for all the modules
From first estimates, only 2-3 floats for SDD and 0-1 float for SSD

13. ITS tasks ESD QA maker: done and committed
ESD QA Checker: to be added this week
Optimization of V0 finder. Marian is working on this
“external” ITS services. We are using the old coarse coding. More news in Mario’s talk
Depends on SDD coding of data from survey. At the end of the week as 0 version
AliITSRecoParam is already in a good shape. This will be closed this week
13 remaining overlaps in SSD. They must be eliminated this week

14. Page updated by Chiara this morning
Shuttle status
Page updated by Chiara this morning
The yellow box should be related to the status bit of SDD high and low voltages and to the status bits of Temeperature readings (2 per module). They were missing in February and should be fine now

15. FDR tasks
There are several outstanding tasks in FDR phase II (and something also in phase I).
To my knowledge, they could be closed

16. Other issues and conclusions
Monthly meetings on
ITS offline
Alignment
Vertexer3D (+ VertexerZ in case of failure) is the default now in AliRoot
Good progress in ITS tracking: see Andrea Dainese presentation on Wednesday
Concerns:
Still some overlaps in the geometry to be removed
One outstanding task on “external” ITS services